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Metallurgical assessment of a hypereutectic aluminum–silicon P/M alloy
- Source :
- Journal of Materials Processing Technology. 209:5902-5911
- Publication Year :
- 2009
- Publisher :
- Elsevier BV, 2009.
-
Abstract
- The objective of this study was to perform a comprehensive assessment on the press-and-sinter P/M processing of a novel hypereutectic aluminum–silicon alloy known as Alumix-231 (Al–15Si–2.5Cu–0.5Mg). As this patented commercial product is relatively new, the amount of scientific data available in the literature is highly limited. To address this issue sintered products were evaluated by analyzing the density before and after sintering, apparent hardness, microstructural features, tensile properties, and finally the response to heat treatment. It was determined that the optimum processing route for Alumix-231 involved compaction at a pressure of 600 MPa followed by de-lubrication at 400 °C for 20 min before being sintered at 560 °C for a period of 60 min. The optimum heat treatment involved solutionizing the samples at 520 °C for 1 h, followed by water quenching, and artificially aging the samples at 160 °C for 8 h. The system proved highly responsive to this manner of processing attaining a sintered density on the order of 98% of theoretical and a UTS of 330 MPa. Based on a combination of DSC, XRD, and EPMA analyses it was concluded that θ-type phases were the dominate precipitates formed during heat treatment.
- Subjects :
- Quenching
Materials science
Metallurgy
Alloy
Metals and Alloys
Compaction
Sintering
chemistry.chemical_element
Electron microprobe
engineering.material
Industrial and Manufacturing Engineering
Computer Science Applications
chemistry
Aluminium
Modeling and Simulation
Powder metallurgy
Ultimate tensile strength
Ceramics and Composites
engineering
Subjects
Details
- ISSN :
- 09240136
- Volume :
- 209
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Processing Technology
- Accession number :
- edsair.doi...........51f1c2589a2d7f790a4051ac64f79df7